Fuses & Circuit Breakers

Although they work in different ways, fuses and circuit breakers broadly have the same purpose; to protect electrical appliances and electrical circuits from short circuits, and excessive current (called overcurrent or overload).

Fuses

Fuses are relatively low cost electrical safety devices. If too much current enters the circuit, the fuse will burn out (sometimes called blowing out). When the fuse blows out it breaks the circuit. This protects the attached devices and allows you to touch devices without being electrocuted. When the fuse blows, it must be replaced before using the device or appliance again.

Circuit breakers

Circuit breakers work in a similar way to fuses, but they are resettable. Once a fault is detected (this is typically a short circuit or an excessive amount of current flowing through the circuit) the circuit breaker will interrupt the flow of current. When the circuit breaker trips, it's simply a case of flicking a switch to reset the circuit breaker. As soon as you've reset the circuit breaker, it is ready to use again.

Circuit Breakers
Circuit Breakers
Earth & Lightning Protection
Earth & Lightning Protection
Fuse Holders & Accessories
Fuse Holders & Accessories
Fuses
Fuses

50636 Products showing for Fuses & Circuit Breakers

658 of 999+
Eaton 2A gG/gL Cartridge Fuse, 22.2 x 58mm
  • RS Stock No. 228-990
  • Mfr. Part No. C22G2
1 Pack of 10
£33.41
Better World
Schneider Electric, Compact MCCB 3P 160A, Breaking Capacity 70 kA, Clip-On
  • RS Stock No. 178-7807
  • Mfr. Part No. LV426559
Each
£695.51
Better World
Schneider Electric MCCB 3P, Fixed Mount
  • RS Stock No. 178-7891
  • Mfr. Part No. LV426946
Each
£24.13
Siemens 350A Tag Fuse, 107mm, 690V, 77mm
  • RS Stock No. 608-350
  • Mfr. Part No. 3NE8231-3MK
1 Pack of 3
£220.93
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 914-4061
  • Mfr. Part No. 2CSR255051R1324 DSE201 C32 AC30 - N Blue
Each
£69.72
Hager HMC MCB, 2P, 80A, 400V AC, 15 Breaking Capacity
  • RS Stock No. 602-110
  • Mfr. Part No. HMC280
Each
£302.24
Better World
ABB, Tmax XT MCCB 4P 160A, Fixed Mount
  • RS Stock No. 236-7468
  • Mfr. Part No. 1SDA067737R1 XT2N 160 TMG 160A FF
Each
£786.59
ABB RCBO, 32A Current Rating, 1P+N Poles, 30mA Trip Sensitivity, Type C, System Pro M Compact Range
  • RS Stock No. 136-7789
  • Mfr. Part No. 2CSR275151R1324 DSE201 M C32 A30 - N Blue
Each
£103.00
Eaton xEffect - FRCmM RCCB, 40A, 2 Pole, 100mA, 240V ac
  • RS Stock No. 123-606
  • Mfr. Part No. 170438 FRCMM-40/2/01-S/A
Each
£243.68
Schneider Electric, PowerPact MCCB 2P 100A, Breaking Capacity 18 kA, Clip-On
  • RS Stock No. 345-256
  • Mfr. Part No. BDF26100
Each
£538.95
ABB F200 RCCB, 63A, 4 Pole, 500mA, Type A, 230/400V ac
  • RS Stock No. 177-5096
  • Mfr. Part No. 2CSF204201R4630 F204 A S-63/0,5
Each
£287.39
Sensata Airpax Airpax Thermal Circuit Breaker - IEG6 Single Pole Panel Mount, 45A Current Rating
  • RS Stock No. 275-0201
  • Mfr. Part No. IEG6-1-51-45.0-A-01-V
Each
£31.85
Better World
Schneider Electric Acti9 1 Phase Busbar, 230 V, 400 V, 9mm Pitch
  • RS Stock No. 238-4090
  • Mfr. Part No. A9XPP712
Each (In a Pack of 12)
£79.024
Better World
Schneider Electric Acti9 iIG40 RCCB, 40A, 3+N Pole, 30mA, Type AC, 380 → 415V ac
  • RS Stock No. 238-3466
  • Mfr. Part No. A9R67740
Each
£324.06
Schneider Electric, ComPacT MCCB 4P 100A, Fixed Mount
  • RS Stock No. 260-7505
  • Mfr. Part No. C10W42D100
Each
£1,739.27
Schurter CBE Cover for use with TA45
  • RS Stock No. 269-3823
  • Mfr. Part No. 4430.0130
Each
£1.88
Better World
Schneider Electric, Compact MCCB 4P 100A, Breaking Capacity 16 kA, DIN Rail Mount
  • RS Stock No. 178-7919
  • Mfr. Part No. LV426707
Each
£956.93
Schneider Electric, PowerPact MCCB 1P 70A, Breaking Capacity 65 kA, Clip-On
  • RS Stock No. 346-802
  • Mfr. Part No. BJF16070
Each
£600.11
Eaton 3A Cartridge Fuse, 195 x 25.4mm
  • RS Stock No. 245-934
  • Mfr. Part No. 12OBCNA3.15
Each
£159.86
Eaton xEffect MCB, 1P, 40A Curve B, 240V AC, 48V DC, 10 kA Breaking Capacity
  • RS Stock No. 922-6989
  • Mfr. Part No. 278539 FAZ-B40/1
Each
£24.51
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RCBOs Guide
There are many things to consider when choosing the right RCBO. Find out more in our comprehensive RCBOs guide.
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Fuses Guide
Our fuses guide explains what they are, what they are used for, how they work, and the different types available.
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Distribution Boards Guide
Our distribution boards guide explains what they are, their uses and types, and how to connect distribution boards.
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MCBs Guide
What are MCBs and how do they work? Discover all you need to know in our comprehensive guide.
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